Plunger type hydraulic hoist oil cylinder with rod end coating protection structure

Abstract

The utility model discloses a plunger type hydraulic hoist oil cylinder with a rod end coating protection structure, which belongs to the technical field of oil cylinder rod end coating protection structures and comprises an oil cylinder body, a sealing cover is mounted at the rod end of the oil cylinder body, and a first O-shaped sealing ring and a second O-shaped sealing ring are mounted in the sealing cover. Each of the C-shaped sealing strip and the hollow sealing strip comprises a C-shaped sealing strip and a hollow sealing strip, and the hollow sealing strip is clamped in the C-shaped sealing strip. According to the technical key points, the sealing structure can effectively prevent water vapor and salt mist from permeating and play a role in isolating and protecting the chamfer of the plunger rod, in addition, based on the structural composition of the sealing ring, the hollow sealing strip can play a role in extruding and supporting the C-shaped sealing strip, the tightness of connection between the whole sealing structure and the sealing cover can be remarkably improved, and the sealing effect is good. The sealing effect of the connecting position is ensured, and the situation that the sealing structure falls off or shifts to affect the sealing performance is not prone to occurring.

Description

Technical Field

[0001] This utility model relates to the technical field of cylinder rod end coating protection structure, specifically a plunger-type hydraulic gate opening and closing cylinder with rod end coating protection structure. Background Technology

[0002] The working principle of a plunger-type hydraulic gate hoist cylinder is to use the pressure of hydraulic oil to drive the movement of the plunger. When hydraulic oil enters the cylinder from the oil port, it is applied to the plunger and generates a pushing force, causing the plunger to move towards the cylinder head. When hydraulic oil exits from the oil port, the plunger is subjected to external force and moves inward. By controlling the inlet and outlet of the hydraulic oil, the forward and reverse movements of the plunger can be achieved, thereby completing the opening and closing actions of the gate hoist. It is commonly used in ordinary flat gates in water conservancy and hydropower projects, where the opening and closing of ordinary flat gates is controlled by the full extension and retraction of the cylinder plunger rod.

[0003] The hydraulic cylinders of plunger-type gate hoists used in gates are often located in rivers, lakes, and seas, where they are subject to long-term corrosion from water vapor and salt spray, and may even be submerged in water for extended periods. This can easily lead to severe corrosion of the cylinders, especially at the end of the plunger rod, which is constantly exposed. Corrosion can easily penetrate from the chamfer (where a protective coating cannot be applied) to the junction of the plunger rod and the coating (ceramic or chrome plating). Therefore, to address these issues, a hydraulic cylinder for plunger-type gate hoists with a rod end coating protection structure is proposed. Utility Model Content

[0004] The technical problem this utility model aims to solve is to provide a plunger-type hydraulic gate opener cylinder with a rod end coating protection structure. The main body of the cylinder rod end coating protection structure is a closed cover, which is located outside the chamfer of the plunger rod. Inside, there are two sealing structures: a first O-ring and a second O-ring. This effectively prevents water vapor and salt spray from penetrating and provides isolation and protection for the chamfer of the plunger rod. The sealing structure consists of a C-shaped sealing strip and a hollow sealing strip. The C-shaped sealing strip is engaged in the groove of the sealing ring, and the hollow sealing strip is engaged in the C-shaped sealing strip, providing compression and support. This significantly improves the tightness of the connection between the overall sealing structure and the closed cover, ensuring the sealing effect at the connection point and preventing the sealing structure from falling off or shifting and affecting the sealing performance. This solves the technical problem in the prior art where insufficient sealing protection measures at the chamfer of the plunger rod make it susceptible to corrosion and penetration.

[0005] The technical solution adopted by the embodiments of this application to solve its technical problem is:

[0006] A plunger-type hydraulic gate opener cylinder with a rod end coating protection structure includes a cylinder body. A sealing cover is installed on the plunger rod end via bolts. The sealing cover has two sealing ring grooves inside, where a first O-ring and a second O-ring are respectively fitted. This sealing structure effectively prevents moisture and salt spray penetration and provides isolation and protection for the chamfered area of ​​the plunger rod. The cylinder body rod end has an installation groove for a detachable threaded cylinder. The bolts are threadedly connected to the detachable threaded cylinder. This structure allows for a detachable connection between the sealing cover and the cylinder body. The first and second O-rings are identical, both including a C-shaped sealing strip and a hollow sealing strip. The hollow sealing strip is fitted into the C-shaped sealing strip. This connection provides compression support to the C-shaped sealing strip, significantly improving the tightness of the connection between the overall sealing structure and the sealing cover, ensuring a good seal at the connection point, and preventing the sealing structure from detaching or shifting and affecting the sealing performance.

[0007] In one possible implementation, an annular groove is formed on the wall of the sealing ring groove, and the C-shaped sealing strip includes a C-shaped strip body with an end clip fixedly provided at its opening. The above structure can form a snap-fit ​​groove, providing the necessary structural basis for the snap-fit ​​fixing of the hollow sealing strip. Furthermore, an outer snap-fit ​​protrusion is fixedly provided on the outer wall of the C-shaped strip body, the size of which matches the size of the annular groove. This structure can realize the snap-fit ​​connection between the C-shaped sealing strip and the sealing ring groove.

[0008] In one possible implementation, the inner wall of the C-shaped strip body is fixedly provided with an inner snap-fit ​​protrusion, and the hollow sealing strip includes a hollow strip body with side snap-fit ​​grooves on both sides that match the size of the inner snap-fit ​​protrusion. The above structure can realize the snap-fit ​​connection between the hollow sealing strip and the C-shaped sealing strip.

[0009] In one possible implementation, a contact strip is fixedly connected to the end of the hollow strip body. The contact strip is the same width as the C-shaped strip body and is used to fit tightly against the end of the cylinder body rod to provide a sealing and isolation function. In addition, several closed protrusions are fixedly provided on the contact strip. Under the action of extrusion pressure, the closed protrusions can be significantly deformed and fit tightly against the end of the cylinder body rod to form several barrier rings, thereby improving the sealing performance of the seal.

[0010] In one possible implementation, the C-shaped strip body and the end clip form a groove with a convex cross-section, the cross-sectional dimensions of which match the outer cross-sectional dimensions of the hollow strip body. This structural form can achieve a tight snap-fit ​​connection between the C-shaped strip body and the hollow strip body, ensuring that the hollow strip body can apply outward compressive force to the C-shaped strip body. While achieving a tight connection between the two, it also improves the tightness of the connection between the C-shaped sealing strip and the sealing ring groove.

[0011] In one possible implementation, the mounting groove includes a vertical groove with a communicating rotating slot at the bottom. This structure provides the necessary structural basis for the installation and disassembly of the detachable threaded cylinder.

[0012] In one possible implementation, the detachable threaded cylinder includes a threaded cylinder body with a snap-fit ​​lug fixedly disposed on its outer side. The cross-sectional dimensions of the portion of the threaded cylinder body with the snap-fit ​​lug match the dimensions of the vertical groove. When installing the detachable threaded cylinder, it is aligned with the vertical groove and inserted. Finally, it is rotated so that the snap-fit ​​lug engages with the rotating groove, thereby achieving a fixed connection between the detachable threaded cylinder and the rod end of the cylinder body. This detachable method allows for quick and convenient replacement of detachable threaded cylinders with damaged threads, preventing them from affecting the tightness of the connection and thus the sealing effect of the sealing cover.

[0013] In one possible implementation, a friction pad is fixedly attached to the snap-fit ​​ear, and a number of anti-slip ridges are fixedly provided on the surface of the friction pad. The above structure can improve the snap-fit ​​effect between the snap-fit ​​ear and the rotating slot through the friction pad, and can effectively prevent the snap-fit ​​ear from rotating and causing the detachable threaded cylinder to fall off.

[0014] In summary, this utility model has the following beneficial technical effects:

[0015] The main body of the cylinder rod end coating protection structure is a closed cover, which is located outside the chamfer of the plunger rod. Inside, there are two sealing structures: a first O-ring and a second O-ring. This effectively prevents water vapor and salt spray from penetrating and provides isolation and protection for the chamfer of the plunger rod. The sealing structure consists of a C-shaped sealing strip and a hollow sealing strip. The C-shaped sealing strip is engaged in the groove of the sealing ring, and the hollow sealing strip is engaged in the C-shaped sealing strip, providing compression and support. This significantly improves the tightness of the connection between the overall sealing structure and the closed cover, ensuring the sealing effect at the connection point and preventing the sealing structure from falling off or shifting and affecting the sealing performance. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram showing the installation position of the protective structure of this utility model;

[0018] Figure 2 for Figure 1 Enlarged view at point A in the middle;

[0019] Figure 3 This is a schematic diagram of the overall structure of the protective structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the sealing structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the first O-ring seal structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the detachable threaded cylinder installation structure of this utility model.

[0023] In the diagram: 1. Cylinder body; 11. Mounting groove; 111. Vertical groove; 112. Rotary slot; 2. Sealing cover; 21. Sealing ring slot; 22. Annular slot; 3. First O-ring seal; 31. C-shaped sealing strip; 311. C-shaped strip body; 312. Outer snap-fit ​​ridge; 313. Inner snap-fit ​​ridge; 314. End clip; 32. Hollow sealing strip; 321. Hollow strip body; 322. Side slot; 323. Contact strip; 324. Sealing ridge; 4. Second O-ring seal; 5. Bolt connector; 6. Removable threaded cylinder; 61. Threaded cylinder body; 62. Snap-fit ​​ear; 63. Friction pad layer. Detailed Implementation

[0024] The technical solution in this application embodiment is to solve the problems mentioned in the background art, and the overall idea is as follows:

[0025] like Figure 1 - Figure 3 As shown, this embodiment provides a plunger-type hydraulic gate opener cylinder with a rod end coating protection structure, including a cylinder body 1, with a sealing cover 2 installed on the plunger rod end via a bolt connector 5. The sealing cover 2 has two sealing ring grooves 21 inside, in which a first O-ring 3 and a second O-ring 4 are respectively installed. This sealing structure can effectively prevent water vapor and salt spray from penetrating and provides isolation and protection for the chamfered part of the plunger rod. The rod end of the cylinder body 1 has an installation groove 11, in which a detachable threaded cylinder 6 is installed. The bolt connector 5 is threadedly connected to the detachable threaded cylinder 6. This structure can realize a detachable connection between the sealing cover 2 and the cylinder body 1.

[0026] like Figure 4 As shown, the first O-ring 3 and the second O-ring 4 are identical in structure, both including a C-shaped sealing strip 31 and a hollow sealing strip 32. The hollow sealing strip 32 is snapped into the C-shaped sealing strip 31. This connection method can provide compression support for the C-shaped sealing strip 31, which can significantly improve the tightness of the connection between the overall sealing structure and the sealing cover 2, ensure the sealing effect at the connection position, and prevent the sealing structure from falling off or shifting, thus affecting the sealing performance.

[0027] like Figure 4 - Figure 5As shown, the sealing ring groove 21 has an annular groove 22 on its groove wall. The C-shaped sealing strip 31 includes a C-shaped strip body 311, and an end clip 314 is fixedly provided at its opening. The above structure can form a snap-fit ​​groove, providing the necessary structural foundation for the snap-fit ​​fixing of the hollow sealing strip 32. The outer wall of the C-shaped strip body 311 is fixedly provided with an outer snap-fit ​​protrusion 312, the size of which matches the size of the annular groove 22. This structure can realize the snap-fit ​​connection between the C-shaped sealing strip 31 and the sealing ring groove 21. The inner wall of the C-shaped strip body 311 is fixedly provided with an inner snap-fit ​​protrusion 313. The hollow sealing strip 32 includes a hollow strip body 321, and side grooves 322 with the size of the inner snap-fit ​​protrusion 313 are provided on both sides. The above structure can realize the snap-fit ​​connection between the hollow sealing strip 32 and the C-shaped sealing strip 31.

[0028] In addition, a contact strip 323 is fixedly connected to the end of the hollow strip body 321. The contact strip 323 is the same width as the C-shaped strip body 311. The contact strip 323 is used to fit tightly with the rod end of the cylinder body 1 to play a sealing and isolation role. Furthermore, several closed protrusions 324 are fixedly provided on the contact strip 323. Under the action of extrusion pressure, the closed protrusions 324 can be significantly deformed and fit tightly with the rod end of the cylinder body 1 to form several barrier rings, thereby improving the sealing performance of the seal.

[0029] The C-shaped strip body 311 and the end clip 314 form a groove with a convex cross-section. The cross-sectional dimensions of the groove match the outer cross-sectional dimensions of the hollow strip body 321. This structure enables a tight snap-fit ​​connection between the C-shaped strip body 311 and the hollow strip body 321, ensuring that the hollow strip body 321 can apply outward compressive force to the C-shaped strip body 311. While achieving a tight connection between the two, it also improves the tightness of the connection between the C-shaped sealing strip 31 and the sealing ring groove 21.

[0030] like Figure 6 As shown, the mounting groove 11 includes a vertical groove 111, and a rotating slot 112 is provided at the bottom of the vertical groove 111. The above structure provides the necessary structural foundation for the installation and disassembly of the detachable threaded cylinder 6. Correspondingly, the detachable threaded cylinder 6 includes a threaded cylinder body 61, on the outside of which a snap-fit ​​ear 62 is fixedly provided. The cross-sectional dimensions of the portion of the threaded cylinder body 61 with the snap-fit ​​ear 62 are consistent with the dimensions of the vertical groove 111. When installing the detachable threaded cylinder 6, it is aligned with the vertical groove 111 and inserted. Finally, it is rotated so that the snap-fit ​​ear 62 is engaged in the rotating slot 112, thereby achieving a fixed connection between it and the rod end of the cylinder body 1. This detachable method allows for quick and convenient replacement of the detachable threaded cylinder 6 with damaged threads, avoiding any impact on the tightness of the connection and thus affecting the sealing effect of the sealing cover 2.

[0031] Among them, a friction pad 63 is fixedly attached to the snap-fit ​​ear 62, and a number of anti-slip ridges are fixedly provided on the surface of the friction pad 63. The above structure can improve the snap-fit ​​effect between the snap-fit ​​ear 62 and the rotating slot 112 through the friction pad 63, and can effectively prevent the snap-fit ​​ear 62 from rotating and causing the detachable threaded cylinder 6 to fall off.

[0032] The working principle and usage process of this utility model:

[0033] The main body of the cylinder rod end coating protection structure is a closed cover 2, which is located outside the chamfer of the plunger rod. Inside, there are two sealing structures: a first O-ring seal 3 and a second O-ring seal 4. This effectively prevents water vapor and salt spray from penetrating and provides isolation and protection for the chamfer of the plunger rod. The sealing structure consists of a C-shaped sealing strip 31 and a hollow sealing strip 32. The C-shaped sealing strip 31 is engaged in the sealing ring groove 21, and the hollow sealing strip 32 is engaged in the C-shaped sealing strip 31, providing compression and support. This significantly improves the tightness of the connection between the sealing structure and the closed cover 2, ensuring the sealing effect at the connection point and preventing the sealing structure from falling off or shifting and affecting the sealing performance.

[0034] Specifically, the above structure is manifested as follows: the C-shaped sealing strip 31 includes a C-shaped strip body 311, with an end clip 314 fixedly installed at its opening; an outer snap-fit ​​rib 312 is fixedly installed on the outer wall of the C-shaped strip body 311; and an inner snap-fit ​​rib 313 is fixedly installed on the inner wall of the C-shaped strip body 311. The hollow sealing strip 32 includes a hollow strip body 321, with side slots 322 on both sides that match the size of the inner snap-fit ​​rib 313. The C-shaped strip body 311 and the end clip 314 enclose a groove with a convex cross-section, the cross-sectional dimensions of which match the outer cross-sectional dimensions of the hollow strip body 321. The above structure can achieve a tight snap-fit ​​connection between the C-shaped strip body 311 and the hollow strip body 321, ensuring that the hollow strip body 321 can apply outward compressive force to the C-shaped strip body 311. While achieving a tight connection between the two, it also improves the tightness of the connection between the C-shaped sealing strip 31 and the sealing ring slot 21.

[0035] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A plunger-type hydraulic gate opener cylinder with a rod end coating protection structure, characterized in that, include: The cylinder body (1) has a sealing cover (2) installed on the piston rod end through a bolt connector (5). The sealing cover (2) has two sealing ring slots (21) inside, in which a first O-ring seal (3) and a second O-ring seal (4) are respectively installed. The cylinder body (1) has an installation groove (11) at the rod end, in which a detachable threaded cylinder (6) is installed, and the bolt connector (5) is threadedly connected to the detachable threaded cylinder (6). The first O-ring (3) and the second O-ring (4) are identical in composition, both including a C-shaped sealing strip (31) and a hollow sealing strip (32), wherein the hollow sealing strip (32) is snapped into the C-shaped sealing strip (31).

2. The plunger-type hydraulic gate opener cylinder with rod end coating protection structure according to claim 1, characterized in that: The sealing ring groove (21) has an annular groove (22) on its groove wall. The C-shaped sealing strip (31) includes a C-shaped strip body (311), an end clip (314) is fixedly provided at its opening, and an outer snap-fit ​​protrusion (312) is fixedly provided on the outer wall of the C-shaped strip body (311), the size of which matches the size of the annular groove (22).

3. A plunger-type hydraulic gate opener cylinder with a rod end coating protection structure according to claim 2, characterized in that: The inner wall of the C-shaped strip body (311) is fixedly provided with an inner snap-fit ​​protrusion (313), and the hollow sealing strip (32) includes a hollow strip body (321), on both sides of which are provided with side snap-fit ​​grooves (322) that match the size of the inner snap-fit ​​protrusion (313).

4. A plunger-type hydraulic gate opener cylinder with a rod end coating protection structure according to claim 3, characterized in that: The hollow strip body (321) is fixedly connected to a contact strip (323) at its end, which is the same width as the C-shaped strip body (311). In addition, a number of closed protrusions (324) are fixedly provided on the contact strip (323).

5. A plunger-type hydraulic gate opener cylinder with a rod end coating protection structure according to claim 3, characterized in that: The C-shaped strip body (311) and the end clip (314) enclose a groove with a convex cross section, the cross section size of which matches the outer cross section size of the hollow strip body (321).

6. A plunger-type hydraulic gate opener cylinder with a rod end coating protection structure according to claim 1, characterized in that: The mounting groove (11) includes a vertical groove (111), and a rotating slot (112) is provided at the bottom of the vertical groove (111).

7. A plunger-type hydraulic gate opener cylinder with a rod end coating protection structure according to claim 6, characterized in that: The detachable threaded cylinder (6) includes a threaded cylinder body (61) with a snap-fit ​​ear (62) fixedly provided on its outer side. The cross-sectional dimensions of the part of the threaded cylinder body (61) with the snap-fit ​​ear (62) are consistent with the dimensions of the vertical groove (111).

8. A plunger-type hydraulic gate opener cylinder with a rod end coating protection structure according to claim 7, characterized in that: A friction pad (63) is fixedly attached to the snap-fit ​​ear (62), and a number of anti-slip ridges are fixedly provided on the surface of the friction pad (63).

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